Hair dryer



FIG. 1 is a side elevation of a hair dryer showing my new design;

FIG. 2 is a plan view of a hair dryer as shown in FIG. 1;

FIG. 3 is a front elevation of the hair dryer of FIG. 1;

FIG. 4 is a rear elevation of the hair dryer of FIG. 1.

The ornamental design for a hair dryer, as shown.